The above images were shot from a stationary camera with each lens set to the maximum focal length.
They are listed from left to right in the order they were taken.
Interesting is that the Sigma 18-250 frames a lower view of the scene.

The difference between 200mm and 250/270mm is noticeable, but not dramatic when looking at the overall range covered by these lenses.

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Where you buy your gear matters. You expect to get what you ordered and you want to pay a low price for it. The retailers I recommend below are the ones I trust for my own purchases. Get your Sigma 18-200mm f/3.5-6.3 DC OS Lens now from: